LED - WHAT'S THE DIFFERENCE BETWEEN THE LONG AND SHORT LEG?

Let's make our LED shine! Every LED is polarized, meaning it has a positive side and a negative side. The long LED leg is positive (+, red alligator clip), and the short leg is negative (-, black alligator clip).

COIN CELL BATTERY

Our coin cell battery also has a positive and negative side. You can identify the positive side because it's labeled with a plus sign, and the other bumpy side is negative.

LET'S BUILD THE CIRCUIT!

Our coin cell battery also has a positive and negative side. You can identify the positive side because it's labeled with a plus sign, and the other bumpy side is negative. ♦